WHILE REMOVING A BUTTERFLY VALVE FROM 566 DRILL, EE MADE SEVERAL CUTS WITH AN ACETYLENE TORCH. WHILE REMOVING A RUBBER HOSE THAT WAS IN THE WAY, EE PASSED HIS RIGHT HAND NEAR THE FLAME, CAUSING A BURN TO THE WRIST AREA OF THAT HAND. THE BURN SITE DEVELOPED BLISTERS THE NEXT DAY.